PROCEDURAL STANDARDS FOR RETRO-COMMISSIONING OF EXISTING .
PROCEDURALSTANDARDS FORRETRO-COMMISSIONING OFEXISTING BUILDINGS2009 – FIRST EDITIONNational EnvironmentalBalancing Bureau8575 Grovemont CircleGaithersburg, Maryland 20877-4121301-977-3698301-977-9589 FAXwww.nebb.org
PROCEDURAL STANDARDS FORRETRO-COMMISSIONING OF EXISTINGBUILDINGSFirst Edition – March 2009 Copyright NEBB, 2009This book may not be reproduced in any form without written permission of thecopyright owner.These Procedural Standards were developed using reliable engineering principles andresearch plus consultation with, and information obtained from, manufacturers, users,testing laboratories and others having specialized experience. They are subject torevision as further experience and investigation may show it necessary or desirable to doso. Existing building systems commissioning completed to these standards may not beapplicable if the system being commissioned contains features or components that impairthe results of these standards. The National Environmental Balancing Bureau assumes noresponsibility and has no liability for the application of the principles or techniquescontained in these Procedural Standards. Authorities considering adoption of theseProcedural Standards should review all Federal, State, local and contract regulationsapplicable to the specific installation.II
FOREWORDThe purpose of the NEBB Procedural Standards for Retro-Commissioning of Existing Buildings is toestablish a uniform and systematic set of criteria for the performance of the Retro-Commissioning(RCX-EB) process when applied to existing building systems such as a building’s mechanical,electrical and building envelop systems.These standards and procedures are intended as the minimum NEBB requirements that a NEBBCertified RCX-EB Firm shall follow when performing Retro-Commissioning. Contract documentrequirements or contractual agreements between the Owner and the NEBB Certified RCX-EB Firmmay supersede the NEBB requirements. These NEBB RCX-EB procedural standards have beendeveloped using language defined by “SHALL, SHOULD, and MAY” as it relates to the standardsand procedures described in this manual. It is important to note these particular words throughout thismanual and how they pertain to the NEBB standards and procedures.Part 1 STANDARDSThe Standards cover definitions, requirements for quality control, quality compliance, instrumentationrequirements, and report requirements. Requirements for instruments and test equipment areidentified.Part 2 PROCESSThe Process section is devoted to providing a detailed explanation of the retro-commissioningprocess.Part 3 PROCEDURESThe Procedures section covers the technical procedures for retro-commissioning of existing buildings.APPENDICESThe Appendices include the NEBB retro-commissioning process matrix.This First Edition of the RCX-EB Procedural Standards, when used by NEBB Certified RCX-EB Firms,will assure the building owner of a facility that is properly retro-commissioned to improve their facility’sperformance, operation and / or comfort.Andrew P. Nolfo, P.E.NEBB Technical DirectorIII
BUILDINGS SYSTEMS COMMISSIONING COMMITTEE MEMBERSAND OTHER CONTRIBUTORS FOR THIS EDITIONCurrent BSC Committee:James W. Bochat, ChairmanPhoenix, ArizonaGerald T. Bauers, P.E.Kansas City, MOSteve WigginsAtlanta, GeorgiaBarry FitzgeraldBoise, IdahoRobert J. Linder, P.E.St. Paul, MNMichael LockeDallas, TexasJames Whorton, PEKansas City, MOAndrew P. Nolfo, P.EPhoenix, ArizonaAdditional Contributors:Michael P. DolimGaithersburg, MarylandDavid McFarlaneGrand Forks, North DakotaIV
TABLE OF CONTENTSPAGEForewordNEBB Building Systems Commissioning CommitteeTable of ContentsIIIIVVPART 1 – STANDARDSSECTION 1 Definitions1SECTION 2 NEBB Program, Quality Control and Compliance2.12.22.32.4NEBB Programs2.1.1 NEBB Disciplines2.1.2 Certification of Firms2.1.3 Certification of Professionals2.1.4 Recertification RequirementsQuality Assurance Program – Conformance Certification2.2.1 Program Advantages2.2.2 NEBB Quality Assurance Program CertificateQuality Control and Compliance2.3.1 RCx-EB Work ComplianceRCx-EB Certified Professional Responsibilities2.4.1 Execution of RCx-EB Procedures2.4.2 Instrument and Equipment Use and Maintenance2.4.3 Coordination / Supervision2.4.4 Project Communication2.4.5 Work Completion2.4.6 Compilation and Submission of Final RCx Reports999910101010101011111212121212SECTION 3 Responsibilities3.13.23.33.4IntroductionOwner Responsibilities3.2.1 Owner ResponsibilitiesNEBB Certified RCx-EB Firm Responsibilities3.3.1 NEBB Certified RCx-EB Firm Responsibilities3.3.2 NEBB Certified TAB Firm ResponsibilitiesOther Retro-Commissioning Team Member Responsibilities3.4.1 Design Professionals Responsibilities3.4.2 Contractor or Vendor Responsibilities131313131314141414SECTION 4 Standards for Instrumentation and Calibration4.14.2Minimum InstrumentationRange and AccuracyTable 4-1 NEBB Instrumentation Requirements (US Units)Table 4-1 NEBB Instrumentation Requirements (SI Units)V15151618
NEBB RCX-EB PROCEDURAL STANDARDSTABLE OF CONTENTSPAGESECTION 5 Standards for Reports and Forms5.15.2Retro-Commissioning ReportsRequired Pages5.2.1 Report Title Page5.2.2 Report Certification Page5.2.3 Table of Contents Page5.2.4 Executive Summary5.2.5 Project CFR5.2.6 Retro-Commissioning Plan5.2.7 Data Logs5.2.8 Interview Records5.2.9 Testing Check Sheets5.2.10 Utility Usage Evaluation5.2.11 Quick Fix Report5.2.12 Corrective Action Recommendation Report5.2.13 Commissioning Report of Corrective Actions5.2.14 TAB Report5.2.15 Commissioning Communications5.2.16 Test Instrument Page5.2.17 All Report Pages21212122222223232324242424242525252526PART 2 - PROCESSPAGESECTION 6 Retro-Commissioning Process6.1 Introduction6.2 Retro-Commissioning Phases6.3 Contract Phase6.3.1 Introduction6.3.2 Responsibilities6.3.3 Activities6.3.4 Contract Phase Documentation6.4 Pre Site Investigation Phase6.4.1 Introduction6.4.2 Responsibilities6.4.3 Activities6.4.4 Pre Site Investigation Phase Documentation6.5 Site Investigation Phase6.5.1 Introduction6.5.2 Responsibilities6.5.3 Activities6.5.4 Site Investigation Phase Documentation6.6 Analysis Phase6.6.1 Introduction6.6.2 Responsibilities6.6.3 Activities6.6.4 Analysis Phase 636363637
NEBB RCX-EB PROCEDURAL STANDARDSTABLE OF CONTENTSPAGE6.7 Corrective Action Phase6.7.1 Introduction6.7.2 Responsibilities6.7.3 Activities6.7.4 Corrective Action Phase Documentation6.8 Follow-Up Phase6.8.1 Introduction6.8.2 Responsibilities6.8.3 Activities6.8.4 Follow Up Phase Documentation6.9 Retro Commissioning Report3737373839393939394040PART 3 - PROCEDURESSECTION 7 Retro-Commissioning of Existing Buildings7.1 Introduction7.2 Site Investigation Phase7.2.1 Introduction7.2.2 Responsibilities7.2.3 Site Investigation Activities7.2.4 Site Investigation Phase Documentation7.3 Analysis Phase7.3.1 Introduction7.3.2 Responsibilities7.3.3 Activities7.3.4 Analysis Phase DocumentationTable 7-1 NEBB Requirements for RCx-EB414242424252525252525657APPENDICESAPPENDIX ARCx-EB Process MatricesVIIA.1
PART 1 - STANDARDSSECTION 1 DEFINITIONSThese procedural standards have been developed using language defined by “Shall, Should,and May" as it relates to the standards and procedures described in this publication. It isimportant to note these particular words throughout this publication and how they pertain toNEBB standards and procedures.These procedural standards have been developed utilizing ASHRAE Guideline 0 as thestandard for the basic commissioning process for new buildings to ensure industry continuitybut offer expanded procedures that provide a higher technical effort. Many definitions beloware similar to ASHRAE definitions but in some cases include expanded technical clarifications.Acceptance Phase Commissioning: Commissioning tasks executed after the construction hasbeen completed, all Site Observations and Static Tests have been completed and all Pre-FunctionalTesting has been completed and accepted. The main commissioning activities performed during thisphase are verification that the installed systems are functional as verified by conducting FunctionalPerformance tests and Owner Training.Accuracy: The capability of an instrument to indicate the true value of a measured quantity.AHJ: The local governing Authority Having Jurisdiction over the installation.ASHRAE: The American Society of Heating Refrigeration and Air-Conditioning Engineers.Basis of Design (BOD): The Engineer’s Basis of Design is comprised of two components: theDesign Criteria and the Design Narrative, these documents record the concepts, calculations,decisions, and product selections used to meet the Owner’s Project Requirements (OPR) and tosatisfy applicable regulatory requirements, standards, and guidelines.Building Systems Commissioning (BSC): NEBB acronym used to designate its commissioningprogram.Calibrate: The act of comparing an instrument of unknown accuracy with a standard of knownaccuracy to detect, correlate, report, or eliminate by adjustment any variation in the accuracy of thetested instrument.Checklists: Lists of data or inspections that should be verified to ensure proper system orcomponent installation, operation and function. Verification checklists are developed and used duringall phases of the commissioning process to verify that the Owner’s Project Requirements (OPR) isbeing achieved.1
NEBB RCX-EB PROCEDURAL STANDARDSSECTION 1DEFINITIONSCommissionability: Defines a design component or construction process that has the necessaryelements that will allow a system or component to be effectively measured, tested, operated andcommissioned.Commissioning (Cx): See Commissioning ProcessCommissioning Authority (CA): The NEBB Certified BSC Professional who administers the Cxprocess by managing the Cx team. Where CA is used in the standard it means the CA, members ofhis staff or appointed members of the commissioning team.Commissioning Plan: A document that outlines the scope and defines responsibilities, processes,schedules, and the documentation requirements of the Commissioning Process.Commissioning Process: A quality focused process for enhancing the delivery of a project. Theprocess focuses upon verifying and documenting that the facility and all of its systems, components,and assemblies are planned, designed, installed, tested, can be operated and maintained to meet theOwner's Project Requirements.Commissioning Report: The final document which presents the commissioning process results forthe project. Cx reports include an executive summary, the commissioning plan, issue log,correspondence, and all appropriate check sheets and test forms.Commissioning Team: Individual team members whose coordinated actions are responsible forimplementing the Commissioning Process.Contract Documents (CD): Contract documents include design and construction contracts, priceagreements and procedure agreements. Contract Documents also include all final and completedrawings, specifications and all applicable contract modifications or supplements.Continuous Commissioning Process: A continuation of the Commissioning Process well into theOccupancy and Operations Phase. This process verifies that a project continues to meet current andevolving Owner’s Project Requirements. Continuous Commissioning Process activities are ongoingfor the life of the facility.Construction Documents:Construction documents usually include the project manual(specifications), plans (drawings), and general terms and conditions of the contract. Thesedocuments vary from project to project as the owners needs changes and as various State, Federal orInternational regulations dictate.Construction Phase Commissioning (CPC): All commissioning efforts executed during theconstruction process, after the design phase, and prior to the Acceptance Phase Commissioning.Coordination Drawings: Drawings showing the work of all trades that are used to illustrate thatequipment can be installed in the space allocated without compromising equipment function or accessfor maintenance and replacement. These drawings graphically illustrate and dimensionmanufacturers’ recommended maintenance clearances. On mechanical projects, CoordinationDrawings include structural steel, ductwork, major piping and electrical conduit, and show theelevations and locations of the above components.2
NEBB RCX-EB PROCEDURAL STANDARDSSECTION 1DEFINITIONSCorrective Action: The act of repairing, replacing equipment or systems and extending or rebuilding systems through construction activities in response to a set of RCX-EB recommendations.Current Facility Requirements (CFR): A document that lists the facilities current use requirements.Similar to an OPR for new buildings but as applied to an existing facility.Data Logger: A test instrument that is utilized to record specific readings over time. Normally abattery operated instrument with multiple channels for more than one reading.Deferred System Test: Tests that cannot be completed at the end of the acceptance phase due toambient conditions, schedule issues or other conditions preventing testing.Deferred Maintenance: Maintenance procedures which have not been done due to costs, lack ofmanpower or negligence.Deficiency: Any condition that adversely affects the commissionability, operability, maintainability orfunctionality of a system, equipment or component or an issue that does not conform to the projectOPR, contract documents or standard industry best practices.Design Criteria: A listing of the projects design requirements, including its source. These are usedduring the design process to show the design element meets the OPR.Design Development (DD): Design Development takes the schematic design (SD) phase and turnsthese conceptual plans into one-line duct and piping drawings with identifiable zones. Specificationswould be in outline form with typical details shown. DD’s would contain preliminary equipment dataschedules, etc.Design Intent: The overall term that includes the OPR and the BOD. It is a detailed explanation ofthe ideas, concepts, and criteria that are defined by the owner to be important. The design intentdocuments are utilized to provide a written record of these ideas, concepts and criteria.Design Narrative: A written description of the proposed design solutions that satisfy therequirements of the OPR. The preparation of this document is the responsibility of the Engineer. Thenarrative should include a description of the systems selected and why they were chosen. It shouldalso include reasons other systems were considered and rejected. Acceptance of the items in theDesign Narrative should be the consensus of both the Owner and the Engineer.Design Phase Commissioning (DPC): All commissioning tasks executed during the design phaseof the project.Design Professional: The design professional, architect or engineer of record of the project.Environmental Systems: Systems that use a combination of mechanical equipment, airflow, waterflow and electrical energy to provide heating, ventilating, air conditioning, humidification, anddehumidification for the purpose of human comfort or process control of temperature and humidity.Executive Summary: A section of the Commissioning report that reviews the general outcome of theproject. It also includes any unresolved issues, recommendations for the resolution of unresolvedissues and all deferred testing requirements.3
NEBB RCX-EB PROCEDURAL STANDARDSSECTION 1DEFINITIONSFenestration: Any glass opening in a building structure such as windows, skylights and windowwalls.Function: For the purposes of this NEBB Standard, function refers to the specific type of datameasurement specified in Table 4-1 of Section 4, Standards for Instrumentation and Calibration.Functionality: This defines a design component or construction process which will allow a system orcomponent to operate or be constructed in a manner that will produce the required outcome of theOPR.Functional Performance Test (FPT): Tests that are intended to prove functionality of thecomponent or system. FPT’s are done after all PFT tests are complete.Indoor Environmental Quality (IEQ): The relative quality of the indoor air environment and normallyincludes temperature, humidity, levels of CO2 and amounts of particulates such as dust, ozone,formaldehyde, volatile organic compounds (VOC) and other trace elements. IEQ can also relate tobiological contamination such as mold or Legionella bacteria and quality of the space for sound &vibration, views, and daylighting.Industry Accepted Best Practice: A design component or construction process that has achievedindustry consensus for quality performance and functionality. Refer to NEBB Design PhaseCommissioning Handbook for examples.Installation Verification: Observations that confirm the system or component has been installed inaccordance with the contract documents and to industry accepted best practices.Issues Log: A formal and ongoing record of problems or concerns – and their resolution – that havebeen raised by members of the Commissioning Team during the course of the CommissioningProcess.Light Emitting Diode (LED): Illumination devices that are used for small light sources such as exitlights or light signaling or indication. LED lights are very energy efficient but color spectrum is limited.May: The term is used to indicate a course of action that is permissible as determined by the NEBBProcedural Standards but is not required for a NEBB certified project.Maintainability: A design component or construction process that will allow a system or componentto be effectively maintained. This includes adequate room for access to adjust and repair theequipment. Maintainability also includes components that have readily obtainable repair parts orservice.Maintenance Management Work Orders: Work orders for building repairs or troubleshootingcreated from the Owners maintenance management system or procedures.NEBB: National Environmental Balancing BureauNEBB Certified RCX-EB Firm: A firm that has met and maintains all the requirements of the NationalEnvironmental Balancing Bureau for firm certification in Retro Commissioning of Existing Buildings4
NEBB RCX-EB PROCEDURAL STANDARDSSECTION 1DEFINITIONSand is currently certified by NEBB. A NEBB Certified RCX-EB Firm shall employ at least one NEBBCertified RCX-EB Professional in a full time management position.NEBB Certified RCX-EB Report: The final report of a project’s retro commissioning process. Theretro commissioning report includes all testing data results, issue logs, observations and otherpertinent data of the retro-commissioning process. NEBB Certification indicates that the retrocommissioning process and the report have been completed and compiled in accordance with thecurrent edition of the NEBB Procedural Standards for Retro Commissioning of Existing Buildings.NEBB Certified RCX-EB Professional: A full time employee of the firm in a management positionwho has successfully passed the Certified Professional level examinations and maintains the CertifiedProfessional recertification requirements of NEBB.Owner’s Project Requirements (OPR): A written document that details the project requirementsand the expectations of how it will be used and operated. These include project goals, measurableperformance criteria, cost considerations, benchmarks, success criteria, and supporting information.Performance Verification: The act of verifying a facilities comfort level, energy usage or waterusage performance as compared to a previous set of readings or verifications.Precision: The ability of an instrument to produce repeatable readings of the same quantity underthe same conditions. The precision of an instrument refers to its ability to produce a tightly groupedset of values around the mean value of the measured quantity.Pre-Design Phase Commissioning: Commissioning tasks performed prior to the commencement ofdesign activities
The Process section is devoted to providing a detailed explanation of the retro-commissioning process. Part 3 PROCEDURES The Procedures section covers the technical procedures for retro-commissioning of existing buildings. APPENDICES The Appendices include the NEBB retro-commissioning process matrix.
b. A Certified Building Commissioning Professional, certified by the Association of Energy Engineers (AEE); c. An Existing Building Commissioning Professional (CBCP) as certified by the AEE; or d. A Commissioning Process Management Professional (CPMP) certified by ASHRAE The retro-commissioning
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that will result in recommended energy savings. 5. Moving beyond the audit itself, retro-commissioning is the process of reviewing a building’s operations to ensure that all systems are working as designed. Building owners can choose to engage in retro-commissioning on its own, or as a next step to implemen
Retro-commissioning (RCx) is a systematic process to periodically check an existing building’s performance to identify operational improvements that can save energy and thus lower energy bills and improve indoor environment. 1.2 Benefits of Retro-commissioning . There are many bene
“Commissioning” (Cx) Process Applied to New Buildings “Re-Commissioning” (RCx) Process Repeated for Buildings That Have Been Commissioned “Existing Building Commissioning” (EBCx) Process Applied to Existing Buildings Not Previously Commissioned (replaces the older term “Retro-commissioning”). 5
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